A 45 year old woman had a heart attack and was taken to the hospital. While on the operating table she had a near death experience.
Seeing God she asked "Is my time up?" God said, "No, you have another 43 years, 2 months and 8 days to live."
Upon recovery, the woman decided to stay in the hospital and have a face-lift, liposuction, breast implants and a tummy tuck. She even had someone come in and change her hair colour and brighten her teeth! The full package and since she had so much more time to live, she figured she might as well make the most of it.
After her last operation, she was released from the hospital. While crossing the street on her way home, she was killed by an ambulance.
Arriving in front of God, she demanded, "I thought you said I had another 43 years? Why didn't you pull me from out of the path of the ambulance?" God replied: "I didn't recognise you."
Kamis, 11 November 2010
Senin, 01 November 2010
The Youth Pledge
Youth Pledge
The Youth Pledge (Indonesian: Sumpah Pemuda), was a declaration made on 28 October 1928 by young Indonesian nationalists at a conference in the then-Dutch East Indies. They proclaimed three ideals, one motherland, one nation and one language[1].
o
Background
The first Indonesian youth congress was held in Batavia, capital of the then-Dutch East Indies in 1926, but produced no formal decisions but did promote the idea of a united Indonesia. In October 1928, the second Indonesian youth congress was held at three different locations. In the first session, the hope was expressed that the congress would inspire the feeling of unity. The second session saw discussions about educational issues. In the third and final session, held at Jalan Kramat Raya No, 126, on October 28 participants heard the future Indonesian national anthem Indonesia Raya by Wage Rudolf Supratman. The congress closed with a reading of the youth pledge[2][3].
The pledge
In Indonesian, with the original spelling, the pledge reads[2]:
Pertama
Kami poetera dan poeteri Indonesia, mengakoe bertoempah darah jang satoe, tanah air Indonesia.
Kedoea
Kami poetera dan poeteri Indonesia, mengakoe berbangsa jang satoe, bangsa Indonesia.
Ketiga
Kami poetera dan poeteri Indonesia, mendjoendjoeng bahasa persatoean, bahasa Indonesia.
In English:
Firstly
We the sons and daughters of Indonesia, acknowledge one motherland, Indonesia.
Secondly
We the sons and daughters of Indonesia, acknowledge one nation, the nation of Indonesia.
Thirdly
We the sons and daughters of Indonesia, respect the language of unity, Indonesian.
On October 28, 1928, Indonesian youth nationalists from all over the country proclaimed a historic Youth Pledge, known as “Sumpah Pemuda”, for a unity of homeland, nation and language. This pledge helped Indonesia’s unification in Indonesia’s struggle for Independence. Ever since then, the Youth Pledge has been the quintessential symbol marking youth’s role and involvement in a nation building and development.
As a youth, and as an Indonesian, one could not help but to question whether any development has occur within the youth’s movement in the past 79 years. In evaluating this situation, we shall first analyze the challenges faced by each youth movement. This analysis is needed because the characteristic of a youth’s movement is largely intertwined with the challenges faced by such movement. Hence a comparative analysis on the characterization of the youth’s movement and its challenges before and after 1928 has to be employed.
Youth’s movement before the year of 1928 faces the challenge of colonialism and the repression of any freedom, particularly for any freedom of expression and right to education. This challenge is not only faced by Indonesian youth movement, but almost any other movement in any colonized territory. Specifically in Indonesia, the youth movement is characterized with segregation. This character is due to nature of multicultural Indonesia which is comprised more than 300 ethic groups and 200 different languages that stretch across 1,919,440 km². Along with this nature is the divide et impera’s politic employed by the Dutch colonialism.
The second character of youth’s movement pre-1928 is how it was led by intellectuals that reside in foreign countries. This character is mostly caused by the nature of education provided by the Dutch colony in Indonesia by that time. Education in Indonesia was only limited to an exclusive class of society, and focused on professional training rather than on higher graduate education. This tendency occurs because the Dutch colony’s need to have employees in the bureaucracy and equality of the Dutch children residing in Indonesia while trying to prevent any movement for independence on Indonesia’s part.
The youth’s movement after 1928, particularly after Indonesia’s independence, faces challenges that are different from the challenges faced by the youth movement before 1928. The challenges faced by nowadays youth movement are the fight for democracy and human right, global economy, free trade, and Indonesia’s position within the world’s economic and political realm.
Although the different challenges being faced by nowadays youth movement, there are similar traits from which we may take lessons from. The nature of these challenges are actually same, in spite of its’ different outlook. There still exist, however, a tension between the developed and developing countries, and many views free trade as consequence of globalization is a tool of neo-colonization. Therefore, despite the different outlook that nowadays challenges presents, we are still facing the same demon: colonization.
Moreover, if we compared the second character of youth movement, the number of intellectuals that reside in foreign countries is not too much difference either. The number of intellectuals residing in foreign countries is still and even higher than pre-1928. For instance, there are around 20.000 Indonesian youth intellectuals in Australia, 26.000 in Malaysia, 5000 in Egypt and more than hundred thousands spread in United State, Europe, India, Japan and others.
Based upon this comparison, there are certain actions that could be taken by the present youth movement, particularly for the youth living and/or residing in foreign countries, to handle the national and international challenges.
First, in fighting against the challenges by the outside world, Indonesia would first need strength. Indonesia’s strength would only be derived from Indonesia’s unity. In this context the internal structure within Indonesia has to be strengthened for escalating Indonesia’s reputation worldwide. The sense of nationalism and our national character need to be encouraged and grown. And not less important that in order to balance individual necessity to provide for basic needs while balancing our civic duty to uphold the nations’ and collective needs, each of us should advocate for a better Indonesia by upholding the political, moral and economical standard for ourselves.
Second, intellectuals residing in foreign countries can have much more access to sources that are not available in Indonesia. Thus, we must always remember to transfer the knowledge, information and technology gained by all means, such as writing in mass media, mentoring, giving lectures, conducting seminars or workshop for people who reside in Indonesia. This is similar to what was done by the intellectuals residing in the Netherlands that established the “Pendidikan Nasional Indonesia” (Indonesian National Education) which aims to share the education and knowledge gained with fellow Indonesians.
Third, the fact that we are all Indonesians means that we all represent Indonesia either we are residing in Indonesia or abroad. By being outside of Indonesia, one is held up to a higher standard than the one being held in Indonesia, because one then becomes an unofficial ambassador of Indonesia in every aspect. We reflected on Bung Hatta’s experience that gained friendship with Jawaharlal Nehru in seminars against colonialism. This friendship then developed into diplomacy, and this diplomacy helped Indonesia when Nehru takes sides and supported Indonesia’s independence in front of the United Nations right after 1945.
Bearing in mind that the past experience had shown us how we are able to make changes through actions taken in foreign countries that would eventually shape and influence the national development that will bring Indonesia become a greater nation. Unfortunately, till today there has not a global unity among Indonesian youth across the world nor enough coordination and communication between domestic and international youth movement. Consequently, the youth movement and its role are become powerless to tackle current challenges.
The Youth Pledge (Indonesian: Sumpah Pemuda), was a declaration made on 28 October 1928 by young Indonesian nationalists at a conference in the then-Dutch East Indies. They proclaimed three ideals, one motherland, one nation and one language[1].
o
Background
The first Indonesian youth congress was held in Batavia, capital of the then-Dutch East Indies in 1926, but produced no formal decisions but did promote the idea of a united Indonesia. In October 1928, the second Indonesian youth congress was held at three different locations. In the first session, the hope was expressed that the congress would inspire the feeling of unity. The second session saw discussions about educational issues. In the third and final session, held at Jalan Kramat Raya No, 126, on October 28 participants heard the future Indonesian national anthem Indonesia Raya by Wage Rudolf Supratman. The congress closed with a reading of the youth pledge[2][3].
The pledge
In Indonesian, with the original spelling, the pledge reads[2]:
Pertama
Kami poetera dan poeteri Indonesia, mengakoe bertoempah darah jang satoe, tanah air Indonesia.
Kedoea
Kami poetera dan poeteri Indonesia, mengakoe berbangsa jang satoe, bangsa Indonesia.
Ketiga
Kami poetera dan poeteri Indonesia, mendjoendjoeng bahasa persatoean, bahasa Indonesia.
In English:
Firstly
We the sons and daughters of Indonesia, acknowledge one motherland, Indonesia.
Secondly
We the sons and daughters of Indonesia, acknowledge one nation, the nation of Indonesia.
Thirdly
We the sons and daughters of Indonesia, respect the language of unity, Indonesian.
On October 28, 1928, Indonesian youth nationalists from all over the country proclaimed a historic Youth Pledge, known as “Sumpah Pemuda”, for a unity of homeland, nation and language. This pledge helped Indonesia’s unification in Indonesia’s struggle for Independence. Ever since then, the Youth Pledge has been the quintessential symbol marking youth’s role and involvement in a nation building and development.
As a youth, and as an Indonesian, one could not help but to question whether any development has occur within the youth’s movement in the past 79 years. In evaluating this situation, we shall first analyze the challenges faced by each youth movement. This analysis is needed because the characteristic of a youth’s movement is largely intertwined with the challenges faced by such movement. Hence a comparative analysis on the characterization of the youth’s movement and its challenges before and after 1928 has to be employed.
Youth’s movement before the year of 1928 faces the challenge of colonialism and the repression of any freedom, particularly for any freedom of expression and right to education. This challenge is not only faced by Indonesian youth movement, but almost any other movement in any colonized territory. Specifically in Indonesia, the youth movement is characterized with segregation. This character is due to nature of multicultural Indonesia which is comprised more than 300 ethic groups and 200 different languages that stretch across 1,919,440 km². Along with this nature is the divide et impera’s politic employed by the Dutch colonialism.
The second character of youth’s movement pre-1928 is how it was led by intellectuals that reside in foreign countries. This character is mostly caused by the nature of education provided by the Dutch colony in Indonesia by that time. Education in Indonesia was only limited to an exclusive class of society, and focused on professional training rather than on higher graduate education. This tendency occurs because the Dutch colony’s need to have employees in the bureaucracy and equality of the Dutch children residing in Indonesia while trying to prevent any movement for independence on Indonesia’s part.
The youth’s movement after 1928, particularly after Indonesia’s independence, faces challenges that are different from the challenges faced by the youth movement before 1928. The challenges faced by nowadays youth movement are the fight for democracy and human right, global economy, free trade, and Indonesia’s position within the world’s economic and political realm.
Although the different challenges being faced by nowadays youth movement, there are similar traits from which we may take lessons from. The nature of these challenges are actually same, in spite of its’ different outlook. There still exist, however, a tension between the developed and developing countries, and many views free trade as consequence of globalization is a tool of neo-colonization. Therefore, despite the different outlook that nowadays challenges presents, we are still facing the same demon: colonization.
Moreover, if we compared the second character of youth movement, the number of intellectuals that reside in foreign countries is not too much difference either. The number of intellectuals residing in foreign countries is still and even higher than pre-1928. For instance, there are around 20.000 Indonesian youth intellectuals in Australia, 26.000 in Malaysia, 5000 in Egypt and more than hundred thousands spread in United State, Europe, India, Japan and others.
Based upon this comparison, there are certain actions that could be taken by the present youth movement, particularly for the youth living and/or residing in foreign countries, to handle the national and international challenges.
First, in fighting against the challenges by the outside world, Indonesia would first need strength. Indonesia’s strength would only be derived from Indonesia’s unity. In this context the internal structure within Indonesia has to be strengthened for escalating Indonesia’s reputation worldwide. The sense of nationalism and our national character need to be encouraged and grown. And not less important that in order to balance individual necessity to provide for basic needs while balancing our civic duty to uphold the nations’ and collective needs, each of us should advocate for a better Indonesia by upholding the political, moral and economical standard for ourselves.
Second, intellectuals residing in foreign countries can have much more access to sources that are not available in Indonesia. Thus, we must always remember to transfer the knowledge, information and technology gained by all means, such as writing in mass media, mentoring, giving lectures, conducting seminars or workshop for people who reside in Indonesia. This is similar to what was done by the intellectuals residing in the Netherlands that established the “Pendidikan Nasional Indonesia” (Indonesian National Education) which aims to share the education and knowledge gained with fellow Indonesians.
Third, the fact that we are all Indonesians means that we all represent Indonesia either we are residing in Indonesia or abroad. By being outside of Indonesia, one is held up to a higher standard than the one being held in Indonesia, because one then becomes an unofficial ambassador of Indonesia in every aspect. We reflected on Bung Hatta’s experience that gained friendship with Jawaharlal Nehru in seminars against colonialism. This friendship then developed into diplomacy, and this diplomacy helped Indonesia when Nehru takes sides and supported Indonesia’s independence in front of the United Nations right after 1945.
Bearing in mind that the past experience had shown us how we are able to make changes through actions taken in foreign countries that would eventually shape and influence the national development that will bring Indonesia become a greater nation. Unfortunately, till today there has not a global unity among Indonesian youth across the world nor enough coordination and communication between domestic and international youth movement. Consequently, the youth movement and its role are become powerless to tackle current challenges.
Minggu, 24 Oktober 2010
All About Bukittinggi
Bukittinggi, The Most Relaxed Town in All Sumatra
Bukittinggi is one of the loveliest, friendliest, most relaxed town in all Sumatra. This town is situated more or less 930 meters above sea level. Bukittinggi, formerly named Fort De Cock by the Dutch, has a cool climate and is surrounded by three volcanoes: Tandikat, Singgalang and Merapi. In the outskirts of the town is the Ngarai Sianok canyon, a canyon separating Bukittinggi from Kota Gadang, 12 km away overland. Kota Gadang is renowned for its fine silver filigree and hand embroidery.
A center of attraction is the town’s clock-tower, topped with a horn- shaped roof and referred to by the people as Jam Gadang. It overlooks the market square and the city’s magnificent surroundings.
Also worth visiting is the Museum which is a Rumah Gadang, a traditional extended family house built in the 19th century. There are dance performances at the museum’s open stage every Sunday and on public holidays. Night dance performances are at Sliguri. It is also worth seeing the bullfights at Padang Lawas (6 km south of Bukittinggi) every Tuesday at 5.00 p.m.
Also worth visiting is the Museum which is a Rumah Gadang, a traditional extended family house built in the 19th century. There are dance performances at the museum’s open stage every Sunday and on public holidays. Night dance performances are at Sliguri. It is also worth seeing the bullfights at Padang Lawas (6 km south of Bukittinggi) every Tuesday at 5.00 p.m.From Jakarta International Airport to Minangkabau International Airport in Ketaping it will take about 2 hours, after you arrive you can use Taxi or Bus to Bukittinggi.
There are various Inns and Hotels in Bukittinggi, If you are looking for a star hotel, theres Novotel Coralia Bukittinggi with a grand view of the beautiful Anai valley, while Lima’s Hotel, Hotel Asia and Hotel Denai are classified locally as ‘superior hotels’.
- Simpang Raya, Jl Muka Jam Gadang. This large, popular restaurant has good-quality Padang food plus a basic Indonesian menu with soup, rice or noodle dishes.
- Under the Bridge Restaurant, Jl A Yani. This is a slightly up market travelers’ restaurant serving steaks, pasta, pizza, apple pie and chocolate cake.
You can move around the city by Taxi, Bus or rent a car. Theres also a horse carriage or sado provide a colorful charming transportation to move around through the town.
- Watching one of the landmarks of the city, the Bukittinggi Big Ben or known as Jam Gadang. Also.
- Make nice trips in the environment like to the Harau nature reserve, the Pagaruyung Minangkabau palace and Lake Singkarak.
As a tourist center, Bukittinggi boasts a multitude of craft, souvenir, jewelry, and antique shops. Many craft village lie within an hour ride from Bukittinggi.
Shopping
- Lively Pasar Atas (Upper Market), just south of the clock tower, is lined with stalls and shops selling everyday goods and souvenirs. Nearby, Sumatera,
- Jl Minangkabau 19, has a huge range of textiles from Sumba and Irian Jaya and king sticks from North Sumatra.
- Though the horse carriage is far more expensive than the ‘ojek’, it is very popular with the locals, especially since it can carry whole families.
- The tourist office is at Jl Syech Bantam 1 (Mon-Thurs 8am-2pm, Fri 8-11am, Sat 8am-12.30pm; tel 0752/22403), near the clock tower.
- Tours: Many places offer one-day local tours to traditional villages, the Pagaruyung palace and the Harau Canyon.
Kamis, 07 Oktober 2010
Topologi Jaringan
Topologi Jaringan adalah Konfigurasi tentang bagaimana menghubungkan komputer, kabel dan peripheral lainnya sehingga membentuk sebuah jaringan. Ada beberapa Topologi Jaringan di dalam Dunia Teknologi Informatika ini seperti Topologi Bus, Topologi Ring, dan Topologi Star. Berikut Penjelasan dari 3 Topologi Jaringan ini :
1. Topologi Bus
Topologi Bus merupakan topologi yang banyak digunakan pada masa penggunaan kabel coaxial. Dengan menggunakan T-Connector maka komputer atau perangkat jaringan lainnya bisa dengan mudah dihubungan satu sama lainnya. Pada topologi ini komputer server dan workstation dihubungkan secara berantai melalui kabel tunggal. Topologi ini mudah di kembangkan dan sederhana namun bila salah satu workstation mati maka yang lain akan terpengaruh.
Topologi ini mempunyai karakteristik :
- Merupakan satu kabel yang kedua ujungnya ditutup dimana sepanjang kabel terdapat node-node.
- Paling prevevalent karena sederhana dalam instalasi.
- Signal melewati kabel 2 arah dan mungkin terjadi collision.
- Problem terbesar dari Topologi Bus adalah Jika salah satu segmen kabel putus, maka seluruh jaringan akan berhenti.
- Topologi Bus adalah jalur transmisi dimana sinyal diterima dan dikirimkan pada setiap alat/device yang tersambung pada satu garis lurus (kabel), signal hanya akan ditangkap oleh alat yang dituju, sedangkan alat lainnya yang bukan tujuan akan mengabaikan signal tersebut/hanya akan di lewati signal.
2. Topologi Ring
Topologi Ring mirip dengan topologi bus, bedanya topologi ring ujungnya saling berhubungan seolah membentuk lingkaran cincin. Pada topologi ini data mengalir searah, artinya seluruh komputer dalam jaringan akan ikut ambil bagian dalam mengelola informasi yang lewat sehingga bila salah satu rusak maka akan berpengaruh terhadap seluruh jaringan. Topologi ini memanfaatkan kurva tertutup, artinya informasi dan data serta traffic di salurkan sedemikian rupa sehingga masing-masing node tersambung. Umumnya fasilitas ini memanfaatkan fiber optic sebagai sarananya dan twisted pair
Topologi ini mempunyai karakteristik :
- Lingkaran tertutup yang berisi node-node.
- Sederhana dalam layout.
- Signal mengalir dalam satu arah sehingga menghindari terjadi collision (2 paket data tercampur), sehingga memungkinkan pergerakan data yang lebih cepat dan collision detection yang lebih sederhana.
- Problem terbesar dari Topologi Ring adalah Jika salah satu segmen kabel putus, maka seluruh jaringan akan berhenti.
- Biasanya topologi ring tidak dibuat secara fisik melainkan direalisasikan dengan sebuah consentrator dan terlihat seperti topologi star.
- Peka kesalahan, sehingga jika terdapat gangguan di suatu node mengakibatkan terganggunya seluruh jaringan.
- Pengembangan jaringan lebih kaku
3. Topologi Star
Dalam Topologi Star, setiap komputer/workstation di hubungkan secara langsung melalui media perantara berupa hub/switch. Topologi Star ini banyak digunakan diberbagai tempat, karena kemudahan untuk menambah, mengurangi atau mendeteksi kerusakan jaringan yang ada. Dengan bermodalkan Hub, Kabel UTP dan Crimtool seseorang sudah bisa membuat dengan mudah sebuah system jaringan dengan Topologi Star.
Topologi ini mempunyai karakteristik :
Topologi ini mempunyai karakteristik :
- Setiap node berkomunikasi langsung dengan centra node, traffic data mengalir dari node ke central node dan kembali lagi.
- Mudah di kembangkan karena setiap node hanya memiliki kabel yang langsung terhubung ke central node
- Keunggulan dari Topologi Star adalah Jika salah satu kabel node terputus yang lainnya tidak terganggu.
- Dapat digunakan kabel lower grade karena hanya menghandel satu traffic node dan biasanya menggunakan kabel UTP.
Topologi jala atau Topologi mesh adalah suatu bentuk hubungan antar perangkat dimana setiap perangkat terhubung secara langsung ke perangkat lainnya yang ada di dalam jaringan. Akibatnya, dalam topologi mesh setiap perangkat dapat berkomunikasi langsung dengan perangkat yang dituju (dedicated links).
Dengan demikian maksimal banyaknya koneksi antar perangkat pada jaringan bertopologi mesh ini dapat dihitung yaitu sebanyak n(n-1)/2. Selain itu karena setiap perangkat dapat terhubung dengan perangkat lainnya yang ada di dalam jaringan maka setiap perangkat harus memiliki sebanyak n-1 Port Input/Output (I/O ports).
Berdasarkan pemahaman di atas, dapat dicontohkan bahwa apabila sebanyak 5 (lima) komputer akan dihubungkan dalam bentuk topologi mesh maka agar seluruh koneksi antar komputer dapat berfungsi optimal, diperlukan kabel koneksi sebanyak 5(5-1)/2 = 10 kabel koneksi, dan masing-masing komputer harus memiliki port I/O sebanyak 5-1 = 4 port (lihat gambar).
Dengan bentuk hubungan seperti itu, topologi mesh memiliki beberapa kelebihan, yaitu:
5. Topologi Pohon
Topologi jala atau Topologi mesh adalah suatu bentuk hubungan antar perangkat dimana setiap perangkat terhubung secara langsung ke perangkat lainnya yang ada di dalam jaringan. Akibatnya, dalam topologi mesh setiap perangkat dapat berkomunikasi langsung dengan perangkat yang dituju (dedicated links).
Dengan demikian maksimal banyaknya koneksi antar perangkat pada jaringan bertopologi mesh ini dapat dihitung yaitu sebanyak n(n-1)/2. Selain itu karena setiap perangkat dapat terhubung dengan perangkat lainnya yang ada di dalam jaringan maka setiap perangkat harus memiliki sebanyak n-1 Port Input/Output (I/O ports).
Berdasarkan pemahaman di atas, dapat dicontohkan bahwa apabila sebanyak 5 (lima) komputer akan dihubungkan dalam bentuk topologi mesh maka agar seluruh koneksi antar komputer dapat berfungsi optimal, diperlukan kabel koneksi sebanyak 5(5-1)/2 = 10 kabel koneksi, dan masing-masing komputer harus memiliki port I/O sebanyak 5-1 = 4 port (lihat gambar).
Dengan bentuk hubungan seperti itu, topologi mesh memiliki beberapa kelebihan, yaitu:
Dengan demikian maksimal banyaknya koneksi antar perangkat pada jaringan bertopologi mesh ini dapat dihitung yaitu sebanyak n(n-1)/2. Selain itu karena setiap perangkat dapat terhubung dengan perangkat lainnya yang ada di dalam jaringan maka setiap perangkat harus memiliki sebanyak n-1 Port Input/Output (I/O ports).
Berdasarkan pemahaman di atas, dapat dicontohkan bahwa apabila sebanyak 5 (lima) komputer akan dihubungkan dalam bentuk topologi mesh maka agar seluruh koneksi antar komputer dapat berfungsi optimal, diperlukan kabel koneksi sebanyak 5(5-1)/2 = 10 kabel koneksi, dan masing-masing komputer harus memiliki port I/O sebanyak 5-1 = 4 port (lihat gambar).
Dengan bentuk hubungan seperti itu, topologi mesh memiliki beberapa kelebihan, yaitu:
- Hubungan dedicated links menjamin data langsung dikirimkan ke komputer tujuan tanpa harus melalui komputer lainnya sehingga dapat lebih cepat karena satu link digunakan khusus untuk berkomunikasi dengan komputer yang dituju saja (tidak digunakan secara beramai-ramai/sharing).
- Memiliki sifat Robust, yaitu Apabila terjadi gangguan pada koneksi komputer A dengan komputer B karena rusaknya kabel koneksi (links) antara A dan B, maka gangguan tersebut tidak akan mempengaruhi koneksi komputer A dengan komputer lainnya.
- Privacy dan security pada topologi mesh lebih terjamin, karena komunikasi yang terjadi antara dua komputer tidak akan dapat diakses oleh komputer lainnya.
- Memudahkan proses identifikasi permasalahan pada saat terjadi kerusakan koneksi antar komputer.
- Membutuhkan banyak kabel dan Port I/O. semakin banyak komputer di dalam topologi mesh maka diperlukan semakin banyak kabel links dan port I/O (lihat rumus penghitungan kebutuhan kabel dan Port).
- Hal tersebut sekaligus juga mengindikasikan bahwa topologi jenis ini * Karena setiap komputer harus terkoneksi secara langsung dengan komputer lainnya maka instalasi dan konfigurasi menjadi lebih sulit.
- Banyaknya kabel yang digunakan juga mengisyaratkan perlunya space yang memungkinkan di dalam ruangan tempat komputer-komputer tersebut berada.
5. Topologi Pohon
Topologi jala atau Topologi mesh adalah suatu bentuk hubungan antar perangkat dimana setiap perangkat terhubung secara langsung ke perangkat lainnya yang ada di dalam jaringan. Akibatnya, dalam topologi mesh setiap perangkat dapat berkomunikasi langsung dengan perangkat yang dituju (dedicated links).
Dengan demikian maksimal banyaknya koneksi antar perangkat pada jaringan bertopologi mesh ini dapat dihitung yaitu sebanyak n(n-1)/2. Selain itu karena setiap perangkat dapat terhubung dengan perangkat lainnya yang ada di dalam jaringan maka setiap perangkat harus memiliki sebanyak n-1 Port Input/Output (I/O ports).
Berdasarkan pemahaman di atas, dapat dicontohkan bahwa apabila sebanyak 5 (lima) komputer akan dihubungkan dalam bentuk topologi mesh maka agar seluruh koneksi antar komputer dapat berfungsi optimal, diperlukan kabel koneksi sebanyak 5(5-1)/2 = 10 kabel koneksi, dan masing-masing komputer harus memiliki port I/O sebanyak 5-1 = 4 port (lihat gambar).
Dengan bentuk hubungan seperti itu, topologi mesh memiliki beberapa kelebihan, yaitu:
- Hubungan dedicated links menjamin data langsung dikirimkan ke komputer tujuan tanpa harus melalui komputer lainnya sehingga dapat lebih cepat karena satu link digunakan khusus untuk berkomunikasi dengan komputer yang dituju saja (tidak digunakan secara beramai-ramai/sharing).
- Memiliki sifat Robust, yaitu Apabila terjadi gangguan pada koneksi komputer A dengan komputer B karena rusaknya kabel koneksi (links) antara A dan B, maka gangguan tersebut tidak akan mempengaruhi koneksi komputer A dengan komputer lainnya.
- Privacy dan security pada topologi mesh lebih terjamin, karena komunikasi yang terjadi antara dua komputer tidak akan dapat diakses oleh komputer lainnya.
- Memudahkan proses identifikasi permasalahan pada saat terjadi kerusakan koneksi antar komputer.
- Membutuhkan banyak kabel dan Port I/O. semakin banyak komputer di dalam topologi mesh maka diperlukan semakin banyak kabel links dan port I/O (lihat rumus penghitungan kebutuhan kabel dan Port).
- Hal tersebut sekaligus juga mengindikasikan bahwa topologi jenis ini * Karena setiap komputer harus terkoneksi secara langsung dengan komputer lainnya maka instalasi dan konfigurasi menjadi lebih sulit.
- Banyaknya kabel yang digunakan juga mengisyaratkan perlunya space yang memungkinkan di dalam ruangan tempat komputer-komputer tersebut berada.
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